30886140 has 24 divisors (see below), whose sum is σ = 86481360. Its totient is φ = 8236288.

The previous prime is 30886133. The next prime is 30886147. The reversal of 30886140 is 4168803.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30886133) and next prime (30886147).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30886098 and 30886107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30886147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257325 + ... + 257444.

It is an arithmetic number, because the mean of its divisors is an integer number (3603390).

Almost surely, 2^30886140 is an apocalyptic number.

30886140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30886140 is an abundant number, since it is smaller than the sum of its proper divisors (55595220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30886140 is a wasteful number, since it uses less digits than its factorization.

30886140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514781 (or 514779 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 30886140 is about 5557.5300269094. The cubic root of 30886140 is about 313.7529938393.

The spelling of 30886140 in words is "thirty million, eight hundred eighty-six thousand, one hundred forty".